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Analysis of optical absorption in GaAs nanowire arrays

In this study, the influence of the geometric parameters on the optical absorption of gallium arsenide [GaAs] nanowire arrays [NWAs] has been systematically analyzed using finite-difference time-domain simulations. The calculations reveal that the optical absorption is sensitive to the geometric par...

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Detalles Bibliográficos
Autores principales: Guo, Haomin, Wen, Long, Li, Xinhua, Zhao, Zhifei, Wang, Yuqi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3260325/
https://www.ncbi.nlm.nih.gov/pubmed/22145699
http://dx.doi.org/10.1186/1556-276X-6-617
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author Guo, Haomin
Wen, Long
Li, Xinhua
Zhao, Zhifei
Wang, Yuqi
author_facet Guo, Haomin
Wen, Long
Li, Xinhua
Zhao, Zhifei
Wang, Yuqi
author_sort Guo, Haomin
collection PubMed
description In this study, the influence of the geometric parameters on the optical absorption of gallium arsenide [GaAs] nanowire arrays [NWAs] has been systematically analyzed using finite-difference time-domain simulations. The calculations reveal that the optical absorption is sensitive to the geometric parameters such as diameter [D], length [L], and filling ratio [D/P], and more efficient light absorption can be obtained in GaAs NWAs than in thin films with the same thickness due to the combined effects of intrinsic antireflection and efficient excitation of resonant modes. Optimized geometric parameters are obtained as follows: D = 180 nm, L = 2 μm, and D/P = 0.5. Meanwhile, the simulation on the absorption of GaAs NWAs for oblique incidence has also been carried out. The underlying physics is discussed in this work. PACS: 81.07.Gf nanowires; 81.05.Ea III-V semiconductors; 88.40.hj efficiency and performance of solar cells; 73.50.Pz photoconduction and photovoltaic effects.
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spelling pubmed-32603252012-01-18 Analysis of optical absorption in GaAs nanowire arrays Guo, Haomin Wen, Long Li, Xinhua Zhao, Zhifei Wang, Yuqi Nanoscale Res Lett Original Paper In this study, the influence of the geometric parameters on the optical absorption of gallium arsenide [GaAs] nanowire arrays [NWAs] has been systematically analyzed using finite-difference time-domain simulations. The calculations reveal that the optical absorption is sensitive to the geometric parameters such as diameter [D], length [L], and filling ratio [D/P], and more efficient light absorption can be obtained in GaAs NWAs than in thin films with the same thickness due to the combined effects of intrinsic antireflection and efficient excitation of resonant modes. Optimized geometric parameters are obtained as follows: D = 180 nm, L = 2 μm, and D/P = 0.5. Meanwhile, the simulation on the absorption of GaAs NWAs for oblique incidence has also been carried out. The underlying physics is discussed in this work. PACS: 81.07.Gf nanowires; 81.05.Ea III-V semiconductors; 88.40.hj efficiency and performance of solar cells; 73.50.Pz photoconduction and photovoltaic effects. Springer 2011-12-06 /pmc/articles/PMC3260325/ /pubmed/22145699 http://dx.doi.org/10.1186/1556-276X-6-617 Text en Copyright ©2011 Guo et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Paper
Guo, Haomin
Wen, Long
Li, Xinhua
Zhao, Zhifei
Wang, Yuqi
Analysis of optical absorption in GaAs nanowire arrays
title Analysis of optical absorption in GaAs nanowire arrays
title_full Analysis of optical absorption in GaAs nanowire arrays
title_fullStr Analysis of optical absorption in GaAs nanowire arrays
title_full_unstemmed Analysis of optical absorption in GaAs nanowire arrays
title_short Analysis of optical absorption in GaAs nanowire arrays
title_sort analysis of optical absorption in gaas nanowire arrays
topic Original Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3260325/
https://www.ncbi.nlm.nih.gov/pubmed/22145699
http://dx.doi.org/10.1186/1556-276X-6-617
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